Features: This set of 57 1/4in metric socket sets includes 30 pieces of screwdriver head, screwdriver handles, extension rods, sockets, and wrenches, which can meet various mechanical maintenance needs The sockets set includes various sizes of sleeves and accessories, suitable for screws and nuts of different sizes. Durable chromesteel material ensures long-term use. Precisions machining enables it to provide excellent tightening force and stability Suitable for mechanics, automotive repair workers, DIY enthusiasts, and other people who need mechanical maintenance and disassembly. It can be widely used in scenarios such as automotive repair, home repair, mechanical equipment maintenance, etc Specifications: Material: Chromium Vanadium Steel, High-Speed Steel Box Size: approx 20x12.5x4.5cm/7.87x4.92x1.77in Drive：1/4'' Quantity: 57PCS Package Includes: 1 Set 1/4'' Deive Sockets and Bits note: Due to the problems of lighting effects and shooting angle, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.